VINYL SULFONIC ACID

CAS NO:52556-42-0
EC NO:3039-83-6

SYNONYMS 
VINYLSULFONIC ACID;ethenesulfonic acid;Ethylenesulfonic acid;1184-84-5;Ethylenesulphonic acid;VINYLSULPHONIC ACID;Ethylenesulfonicacid;NSC8957;EINECS 214-676-1;Lyapolate;vinyl sulfonic acid;ethylene sulfonic acid;SCHEMBL16079;Vinylsulfonic Acid, >/=97%;CHEMBL1236690;DTXSID2047018;CTK0I0218;Sodium ethenesulfonate(25%Nasalt);ZINC4216798;AKOS006230508;DB04359;VSO;DB-008982;FT-0722512;NS00005714;30336-EP2309584A1;30336-EP2311464A1;184V845;Q2527228;Ethylenesulfonic acid sodium salt, Sodium vinylsulfonate solution, Vinylsulfonic acid sodium salt;Etensülfonik asit, sodyum salt, homopolimer; POLY (VİNİLSÜLFONİK ASİT, SODYUM TUZ); VİNİL SÜLFONAT, SODYUM TUZ POLİMER; SUDA% ÇÖZÜM: POLY (VINYLSULFONIC ASID) SODYUM TUZU,% 25 SOLN. SUDA; PVSA; Poli (vinil-sülfonik asit, sodyum tuzu) çözeltisi, ağırlıkça 25. H25O’da%, teknik kalite

Vinylsulfonic acid is the organosulfur compound with the formula CH2=CHSO3H. It is the simplest unsaturated sulfonic acid.The C=C double bond is a site of high reactivity. polymerize gives polyvinylsulfonic acid, especially when used as a comonomer with functionalized vinyl and (meth)acrylic acid compounds.It is a colorless, water-soluble liquid,although commercial sVinylsulfonic acid is produced industrially by the alkaline hydrolysis of carbyl sulfate with subsequent acidification of the resulting vinyl sulfonate salt:

Vinylsulfonsäure aus Carbylsulfat
The reaction is highly exothermic (reaction enthalpy: 1,675 kJ/kg) and requires exact maintenance of temperature and pH during the hydrolysis. When calcium hydroxide is used as the hydrolysis medium, a solution of calcium vinyl sulfonate is obtained. Acidification of this hydrolysis mixture with sulfuric acid gives vinylsulfonic acid, together with the poorly soluble calcium sulfate.

Vinylsulfonic acid also can be prepared by dehydration of isethionic acid with phosphorus pentoxide:

Vinylsulfonsäure via Isethionsäure
Vinylsulfonic acid can also be prepared by sulfochlorination of chloroethane, dehydrohalogenation to vinylsulfonyl chloride and subsequent hydrolysis of the acid chloride.

Use
The activated C=C double bond of vinylsulfonic acid reacts readily with nucleophiles in an addition reaction. 2-Aminoethanesulfonic acid is formed with ammonia and 2-methylaminoethanesulfonic acid with methylamine.[8]

Vinylsulfonic acid is the monomer in the preparation of highly acidic or anionic homopolymers and copolymers. These polymers are used in the electronic industry as photoresists, as ion-conductive polymer electrolyte membranes (PEM) for fuel cells. For example, transparent membranes with high ion exchange capacity and proton conductivity can be produced from polyvinylsulfonic acid.

Research
Vinylsulfonic acid may also be grafted to polymeric supports (e.g. polystyrene) to give highly acidic ion exchangers, which used as catalysts for esterification and Friedel-Crafts acylations.[10] Where the sulfonic acid functionality is not essential, the much more usable alkaline aqueous solution of sodium vinylsulfonate is used, which is obtained directly in the alkaline hydrolysis of the carbyl sulfate and is commercially supplied as an aqueous solution..amples can appear yellow or even red.

Poly(vinylsulfonic acid) (PVS) possesses a high acid content (ion-exchange capacity in the chemical formula?=?9.2 meq?·?g-1). Its monomer, vinylsulfonic acid (VSA), had a high acid dissociation ability (Hammett acid function?=?0.74 in water), and a high ionic conductivity (0.04–0.11 S?·?cm-1). The radical polymerization of VSA with various initiators was kinetically investigated. The ESR spectrum of the VSA polymerization mixture showed a strong signal ascribed to the propagation carbon radical of VSA. The molecular weight of PVS increased with the increasing monomer concentration and decreasing radical initiator concentration to yield the PVS with a molecular weight of 4.0?×?104. Proton-conductivity of PVS under hydrated and nonhumidified conditions was on the order of 10-1 and 10-3–10-6 S?·?cm-1, respectively.

sodium isethionate / 1562-00-1
EHS
experiment: 45%

application: nickel plated for auxiliary polisher

point: coating resource and ability, ductility coating can be white effect.

chemical name hydroxyl vinyl sulfonate, sodium salt
molecular formula C2H5O3SNa
CAS No. 1562-00-1
experiment 45% (min)
appearance yellowish colorless liquid
PH value 2-4
Relative density @ 20 ° C 1.31-1.34
resolution
Application base polisher used for ductile quality andUniformly coating ability flair.